package com.blog.inteceptor;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 拦截器-过滤-杜绝未登录用户随意访问
 * 继承HandlerInterceptorAdapter 或 实现HandlerInterceptor
 */
public class LoginInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if(request.getSession().getAttribute("user") == null){
            response.sendRedirect("/admin");
            return false;
        }
        return true;
    }
}
